* {
  margin: 0;
  padding: 0;
}
@import "centered-mixin";
#wrap {
  position: relative;
  width: 300px;
  height: 300px;
  border: 1px solid #1ce37c;
  margin: 0 auto;

  .inner {

    &:nth-child(1) {
      .centered(100px,100px,#5d02ff);
    }

    &:nth-child(2) {
      .centered(50px,50px,#808080);
    }
  }
}
